CN110293145A - A kind of magnalium composite board and preparation method thereof - Google Patents
A kind of magnalium composite board and preparation method thereof Download PDFInfo
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- CN110293145A CN110293145A CN201810244986.5A CN201810244986A CN110293145A CN 110293145 A CN110293145 A CN 110293145A CN 201810244986 A CN201810244986 A CN 201810244986A CN 110293145 A CN110293145 A CN 110293145A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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Abstract
The invention discloses a kind of magnalium composite boards and preparation method thereof.The magnesium alloy composite board material includes magnesium alloy sandwich layer, aluminium alloy clad layer and takes shape in the combination interface layer between the magnesium alloy sandwich layer, aluminium alloy clad layer.The preparation method includes: to cast in the aluminium alloy of melting on magnesium alloy rod, to obtain Mg-Al composite ingot casting；Then Mg-Al composite ingot casting is squeezed, obtains Mg-Al composite blank；Finally the Mg-Al composite blank is rolled, obtains magnalium composite board.The present invention enables aluminum alloy to be formed with magnesium alloy preliminary compound by casting mode, so that magnesium alloy and boss's alloy is formed metallurgical bonding using extrusion process, the bond strength of magnesium alloy and aluminium alloy is further increased finally by rolling.By the synergistic effect of above three technique, it is higher to can be obtained bond strength, mechanical property more preferably magnalium composite board.
Description
Technical field
The present invention relates to Materials Processing Engineering technical fields, and in particular to a kind of magnalium composite board and preparation method thereof.
Background technique
The patent of invention of publication number CN103691910A discloses a kind of aluminium packet magnesium composite plate material preparation method, step are as follows:
By the magnesium alloy member of pre-set dimension through mechanical treatment, chemical cleaning, the greasy dirt and oxide for removing surface are placed in air furnace
Carry out the pre-heat treatment；Fusion casting die is preheated 50 minutes at 450 ~ 650 DEG C together with aluminium alloy heelpiece；Mould after taking out preheating
Tool, the magnesium alloy block of preheating is placed in mold, then pouring temperature control is equably poured in 720 ~ 760 DEG C of aluminium alloy melt
Note is around magnesium alloy block, until molten aluminum just covered MAG block；Entire fusion casting die is quenched rapidly cooling in room temperature water；It will system
After the blank heating got ready keeps the temperature 0.5 ~ 15 hour to 350 ~ 430 DEG C, it is hot-rolled down to and requires thickness.But obtained aluminium packet magnesium composite plate
Material mechanical property simultaneously not up to requires, using limited.
However in the above method, blank is directly rolled under as cast condition, the microstructure shape at material combination interface
State is poor, coarse grains, and there are partial oxidation film layers for combination interface, are unfavorable for two kinds of intermetallic combinations, causes to combine strong
Degree is limited, finally will affect the mechanical property of obtained composite board.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, the purpose of the present invention
It is to propose a kind of magnalium composite board and a kind of preparation method of magnalium composite board, the combination of the magnesium alloy composite board material
Intensity is high, mechanical property is good.
The present inventor studies for a long period of time discovery, the blank by the aluminium packet magnesium composite plate material of CN103691910A be
It is directly rolled under as cast condition, the microstructure state at material combination interface is poor, coarse grains, and there are portions for combination interface
Divide oxidation film layer, be unfavorable for two kinds of intermetallic combinations, causes bond strength limited, finally will affect obtained composite board
Mechanical property.Based on this discovery, the present invention obtains following scheme by numerous experiments.
The invention discloses a kind of magnalium composite board, the magnalium composite board includes magnesium alloy sandwich layer, aluminium alloy packet
Coating and take shape in the combination interface layer between the magnesium alloy sandwich layer, aluminium alloy clad layer.The thickness of the combination interface layer
It is 15-35 μm.In the combination interface layer, on the basis of the gross mass of the combination interface layer, the content ratio of Al and Mg are
1:(1-1.6).
Above-mentioned magnalium composite board is formed with certain thickness combination interface layer, in the thickness range, magnesium alloy
Binding force between sandwich layer and aluminium alloy clad layer is stronger, and the mechanical property of magnalium composite board is higher.When in combination interface layer
Al and Mg content than within the above range when, the atom diffusion effect in combination interface layer is more preferable, magnesium alloy sandwich layer and aluminium
Binding force between alloy cladding layer is stronger, and the mechanical property of magnalium composite board is higher.
The invention also discloses a kind of preparation methods of magnalium composite board comprising following steps:
Step 1: the aluminium alloy solution of molten condition is cast in into magnesium alloy member surface, enables aluminum alloy to solution cladding magnesium alloy member,
Then it cools down, obtains Mg-Al composite ingot casting；
Step 2: step 1 gained Mg-Al composite ingot casting being squeezed, the Mg-Al composite blank of plate is obtained；
Step 3: step 2 gained Mg-Al composite blank being rolled, magnalium composite board is obtained.
Above-mentioned preparation method has the advantages that the mode for first passing through casting, at high temperature aluminium alloy solution and magnesium
Heat transmitting occurs for alloy bar material, melts magnesium alloy rod surface portion, closes at combination interface with aluminium after magnesium alloy rod is cooling
Gold forms fused layers, generates certain binding force, enables aluminum alloy to be formed with magnesium alloy preliminary compound；Using extrusion process, change
The tissue topography of kind magnalium composite ingot and grain size, and the partial oxidation in broken magnalium composite ingot at combination interface
Film layer realizes the intermetallic atom diffusion of aluminium, magnesium at high temperature under high pressure, forms metallurgical bonding, and magnesium alloy and aluminium alloy exist
The bonded area of larger proportion can be formed in extrusion deformation；Finally, the composite board of required thickness can be both formed by rolling,
It can be further improved the bond strength of magnesium alloy and aluminium alloy again.It is directly rolled compared under as cast condition, the present invention passes through
Casting squeezes, the synergistic effect of three technique of rolling, and it is higher to can be obtained bond strength, mechanical property more preferably magnesium aluminum composite board
Material.
Detailed description of the invention
Fig. 1 is the micro-organization chart of magnalium composite board of the present invention；
Fig. 2 is the simple diagram of casting die and magnesium alloy rod cooperation in the present invention.
Appended drawing reference:
1, casting die；11, type chamber；2, magnesium alloy rod.
Specific embodiment
The embodiment of the present invention is described below in detail.The embodiments described below is exemplary, and is only used for explaining this hair
It is bright, and be not considered as limiting the invention.Particular technique or condition are not specified in embodiment, according to text in the art
It offers described technology or conditions or is carried out according to product description.Reagents or instruments used without specified manufacturer,
For can be with conventional products that are commercially available.
The present invention provides a kind of preparation methods of magnalium composite board, specifically include following 5 steps.
Step 1: magnesium alloy being processed into the magnesium alloy rod with pre-set dimension, then passes through chemical cleaning and machinery
The mode of polishing removes the greasy dirt and oxide on the magnesium alloy rod surface.Then, as shown in Fig. 2, by magnesium alloy rod 2
It is fixed in the type chamber 11 of casting die 1, casting die 1 and magnesium alloy rod 2 is preheated into 1-2h at 150-200 DEG C.
In above-mentioned steps, magnesium alloy rod after processing needs to remove the greasy dirt and oxide on surface, otherwise the oil
Dirty and oxide will affect the combination of subsequent magnesium alloy, and the magnesium alloy rod after chemical cleaning and mechanical grinding
Fresh surface can be exposed, be conducive to subsequent and aluminium alloy combination.The chemical cleaning is specifically, be to pass through vapour degreasing
And the mode of solvent cleaning first removes in the greasy dirt, remaining lubricant and machining process on magnesium alloy rod surface
The metallic dust of adherency, then pickling is carried out to magnesium alloy rod surface with pickling solution and achievees the purpose that remove surface film oxide.
Carrying out preheating to casting die and magnesium alloy rod is that vigorous oxidation occurs for magnesium alloy rod surface in order to prevent, while and being
It avoids in subsequent casting, due to casting die, magnesium alloy rod and aluminium alloy solution excessive temperature differentials, causes to combine undesirable ask
Topic.
Step 2: melting being carried out to aluminium alloy, the aluminium alloy solution of molten condition is obtained, when the aluminium alloy solution temperature
After reaching 690-720 DEG C, 3-5min is kept the temperature to the aluminium alloy solution.The purpose of heat preservation is to ensure that aluminium alloy has melted
Entirely, without remaining solid alloy, and ensure that aluminium alloy melt temperature has reached preset temperature when casting.
Step 3: as shown in Fig. 2, the molten aluminium alloy is poured into the type chamber 11 of casting die 1, making the aluminium alloy
Solution fills up the gap between 11 inner wall of type chamber and magnesium alloy rod 2, in other words, makes described in the aluminium alloy solution coats completely
Then magnesium alloy rod cools down at room temperature, Mg-Al composite ingot casting is obtained after solidification.Optionally, after obtaining Mg-Al composite ingot casting,
The oxide skin on Mg-Al composite ingot casting surface layer can be removed by turnery processing.
In above-mentioned steps 3, the preferable aluminium alloy solution of mobility can preferably adapt to the shape of magnesium alloy rod, be conducive to
Heat transmitting occurs for the combination of the two, furthermore at high temperature, aluminium alloy solution and magnesium alloy rod, melts magnesium alloy rod surface element
Point, fused layers are formed (that is, subsequent be formed by conjunction with boundary with aluminium alloy at combination interface after magnesium alloy rod is cooling
Surface layer), certain binding force is generated, enables aluminum alloy to be formed with magnesium alloy preliminary compound.
Step 4: the Mg-Al composite ingot casting being placed in extrusion die, first to the extrusion die and Mg-Al composite ingot casting
It is preheated, preheating temperature is 350-400 DEG C, preheating time 4-6h, is then squeezed the Mg-Al composite ingot casting, is squeezed
Pressing temperature is 350-390 DEG C, extrusion ratio 10-25, the final Mg-Al composite blank for obtaining plate.
In above-mentioned steps 4, extrusion process can improve tissue topography and the grain size of magnalium composite ingot, and crushing aluminum
Partial oxide film in magnesium composite ingot at combination interface is realized the intermetallic atom diffusion of magnalium at high temperature under high pressure, is formed
Metallurgical bonding layer, and magnesium alloy and aluminium alloy can form the faying face of larger proportion in extrusion deformation.
About squeeze temperature, the extruding temperature be chosen as 350 DEG C, 355 DEG C, 360 DEG C, 365 DEG C, 370 DEG C, 375 DEG C,
380℃,385℃,390℃,395,400.Inventors have found that squeezing, temperature is unsuitable excessively high, and when squeezing, temperature is excessively high, will cause magnesium
The coarse grains of aluminium composite ingot cause the burning behavior of material, seriously affect the mechanical property of Mg-Al composite blank.Squeeze temperature
Spend low, the plasticity and toughness of Mg-Al composite ingot casting will receive limitation, carries out squeezing under higher extrusion ratio and easily occurs not squeezing out
Behavior.
About extrusion ratio, the extrusion ratio is chosen as 10,11,12,13,14,15,16,17,18,19,20,21,22,23,
24,25.Inventors have found that will lead to magnesium alloy and the combination of aluminium alloy is bad when extrusion ratio is too small, or even there is peeling,
Seriously affect the mechanical property of magnalium composite board；When extrusion ratio is excessive, it is desirable that extruding temperature also need to correspondingly increase, this is to make
The case where at magnalium composite board coarse grains, directly affect the elongation percentage of composite board；Meanwhile extrusion ratio is excessive, due to aluminium
The mobility of alloy and magnesium alloy is variant, and plate is not easy to squeeze out from die hole.Therefore, in order to obtain, bond strength is high, power
The good magnalium composite board of performance is learned, strict control is needed to squeeze temperature and extrusion ratio.
Step 5: the Mg-Al composite blank being rolled, magnalium composite board is finally obtained.Wherein, rolling temperature is
350-400 DEG C, a time or multi- pass rolling are carried out to the Mg-Al composite blank, the amount of rolling is 20-50% down per pass.
In above-mentioned steps 5, the Mg-Al composite blank by rolling can be made into the composite board of required thickness, meanwhile, lead to
Rolling mill practice to be crossed, can further destroy the oxidation film of combination interface, the bond strength of magnesium alloy and aluminium alloy will further improve,
It will further improve the mechanical property of magnalium composite board.Wherein, the amount of rolling is to influence composite board bond strength down per pass
One of important factor in order, under the amount of rolling is too low can reduce draught pressure so that the bond strength of magnesium alloy and aluminium alloy declines；Under
The excessively high deflection per pass that can make Mg-Al composite blank of the amount of rolling is excessive, since magnesium, aluminum material deformation have differences, easily leads
The magnesium alloy of internal layer is caused to expose；Meanwhile deflection increase also increases the risk of material removing per pass.Rolling temperature equally can
The performance of composite board is influenced, rolling temperature is excessively high, and the oxidation tendency at the combination interface of magnesium alloy and aluminium alloy sharply increases,
Influence bond strength.Meanwhile rolling temperature is excessively high will lead to composite board coarse grains, affects the mechanical properties.Rolling temperature mistake
Low, the plasticity and toughness of Mg-Al composite blank reduce, and peeling easily occur.
Preferably, the invention also includes steps 6: making annealing treatment to the magnalium composite board, the annealing temperature
It is 250 DEG C, time 1-3h.Annealing can promote interatomic thermal diffusion to realize the combination of metallic bond, increase faying face face
Product achievees the purpose that improve composite board bond strength.At the same time, annealing can effectively eliminate residual stress, change
The deformability of kind composite board.
As shown in Figure 1, the magnalium composite board being prepared by the method for the invention includes magnesium alloy sandwich layer, described in cladding
The aluminium alloy clad layer of magnesium alloy sandwich layer and take shape in combination interface between the magnesium alloy sandwich layer, aluminium alloy clad layer
Layer, the combination interface layer with a thickness of 15-35 μm, on the basis of the gross mass of the combination interface layer, the content ratio of Al and Mg
For 1:(1-1.8).The thickness of the combination interface layer and the content ratio of Al, Mg are in above range, the knot of magnalium composite board
Conjunction intensity is preferable, and mechanical property is more excellent.
Skilled person will appreciate that magnalium composite board is not easy-peel when the bond strength of magnalium composite board is higher
From mechanical property can also be highly improved.
It below will the present invention will be described in detail by embodiment and comparative example.Wherein selected magnesium alloy is AZ31
Magnesium alloy, selected aluminium alloy are 6061 aluminium alloys.
Embodiment 1
Step 1: magnesium alloy is processed into the magnesium alloy rod that diameter is 75mm, it is clear by vapour degreasing, solvent washing, pickling solution
It washes and the mode of mechanical grinding removes surface and oil contaminant and oxide, the magnesium alloy rod is then fixed on casting die
Type is intracavitary, and the diameter of the type chamber is 92mm, and the casting die and magnesium alloy rod are preheated 1.5h at 200 DEG C.
Step 2: melting being carried out to aluminium alloy, the aluminium alloy solution of molten condition is obtained, when the aluminium alloy solution temperature
After reaching 710 DEG C, 5min is kept the temperature to the aluminium alloy solution.
Step 3: the type that the molten aluminium alloy is poured into casting die is intracavitary, and the aluminium alloy solution is made to coat institute completely
Magnesium alloy rod is stated, is then cooled down at room temperature, Mg-Al composite ingot casting is obtained after solidification.
Step 4: the Mg-Al composite ingot casting being placed in extrusion die, first to the extrusion die and Mg-Al composite ingot casting
It is preheated, preheating temperature is 385 DEG C, preheating time 5h, is then squeezed the Mg-Al composite ingot casting, and temperature is squeezed
It is 365 DEG C, extrusion ratio 11, the final Mg-Al composite blank obtained with a thickness of 12mm plate.
Step 5: the Mg-Al composite blank being rolled wherein, rolling temperature is 390 DEG C, to the Mg-Al composite base
Material carries out 8 passes, and the amount of rolling is respectively 26.7%, 20%, 25%, 25%, 30%, 30%, 35%, 50% down per pass, is finally obtained
With a thickness of the magnalium composite board A1 of 1.1mm.
Embodiment 2
Step 1: magnesium alloy is processed into the magnesium alloy rod that diameter is 70mm, it is clear by vapour degreasing, solvent washing, pickling solution
It washes and the mode of mechanical grinding removes surface and oil contaminant and oxide, the magnesium alloy rod is then fixed on casting die
Type is intracavitary, and the diameter of the type chamber is 92mm, and the casting die and magnesium alloy rod are preheated 1.5h at 200 DEG C.
Step 2: melting being carried out to aluminium alloy, the aluminium alloy solution of molten condition is obtained, when the aluminium alloy solution temperature
After reaching 695 DEG C, 5min is kept the temperature to the aluminium alloy solution.
Step 3: the type that the molten aluminium alloy is poured into casting die is intracavitary, and the aluminium alloy solution is made to coat institute completely
Magnesium alloy rod is stated, is then cooled down at room temperature, Mg-Al composite ingot casting is obtained after solidification.
Step 4: the Mg-Al composite ingot casting being placed in extrusion die, first to the extrusion die and Mg-Al composite ingot casting
It is preheated, preheating temperature is 385 DEG C, preheating time 5h, is then squeezed the Mg-Al composite ingot casting, and temperature is squeezed
It is 370 DEG C, extrusion ratio 12, the final Mg-Al composite blank obtained with a thickness of 12mm plate.
Step 5: the Mg-Al composite blank being rolled wherein, rolling temperature is 390 DEG C, to the Mg-Al composite base
Material carries out 8 passes, and the amount of rolling is respectively 26.7%, 20%, 25%, 25%, 30%, 30%, 35%, 50% down per pass, is finally obtained
With a thickness of the magnalium composite board A2 of 1.1mm.
Embodiment 3
Step 1: magnesium alloy is processed into the magnesium alloy rod that diameter is 65mm, it is clear by vapour degreasing, solvent washing, pickling solution
It washes and the mode of mechanical grinding removes surface and oil contaminant and oxide, the magnesium alloy rod is then fixed on casting die
Type is intracavitary, and the diameter of the type chamber is 92mm, and the casting die and magnesium alloy rod are preheated 1.5h at 200 DEG C.
Step 2: melting being carried out to aluminium alloy, the aluminium alloy solution of molten condition is obtained, when the aluminium alloy solution temperature
After reaching 700 DEG C, 4min is kept the temperature to the aluminium alloy solution.
Step 3: the type that the molten aluminium alloy is poured into casting die is intracavitary, and the aluminium alloy solution is made to coat institute completely
Magnesium alloy rod is stated, is then cooled down at room temperature, Mg-Al composite ingot casting is obtained after solidification.
Step 4: the Mg-Al composite ingot casting being placed in extrusion die, first to the extrusion die and Mg-Al composite ingot casting
It is preheated, preheating temperature is 385 DEG C, preheating time 5h, is then squeezed the Mg-Al composite ingot casting, and temperature is squeezed
It is 370 DEG C, extrusion ratio 11, the final Mg-Al composite blank for obtaining the plate with a thickness of 12mm.
Step 5: the Mg-Al composite blank being rolled wherein, rolling temperature is 390 DEG C, to the Mg-Al composite base
Material carries out 8 passes, and the amount of rolling is respectively 26.7%, 20%, 25%, 25%, 30%, 30%, 35%, 50% down per pass, is finally obtained
With a thickness of the magnalium composite board A3 of 1.1mm.
Embodiment 4
Step 1: magnesium alloy is processed into the magnesium alloy rod that diameter is 60mm, it is clear by vapour degreasing, solvent washing, pickling solution
It washes and the mode of mechanical grinding removes surface and oil contaminant and oxide, the magnesium alloy rod is then fixed on casting die
Type is intracavitary, and the diameter of the type chamber is 92mm, and the casting die and magnesium alloy rod are preheated 1.5h at 200 DEG C.
Step 2: melting being carried out to aluminium alloy, the aluminium alloy solution of molten condition is obtained, when the aluminium alloy solution temperature
After reaching 690 DEG C, 4min is kept the temperature to the aluminium alloy solution.
Step 3: the type that the molten aluminium alloy is poured into casting die is intracavitary, and the aluminium alloy solution is made to coat institute completely
Magnesium alloy rod is stated, is then cooled down at room temperature, Mg-Al composite ingot casting is obtained after solidification.
Step 4: the Mg-Al composite ingot casting being placed in extrusion die, first to the extrusion die and Mg-Al composite ingot casting
It is preheated, preheating temperature is 385 DEG C, preheating time 5h, is then squeezed the Mg-Al composite ingot casting, and temperature is squeezed
It is 370 DEG C, extrusion ratio 11, the final Mg-Al composite blank for obtaining the plate with a thickness of 12mm.
Step 5: the Mg-Al composite blank being rolled wherein, rolling temperature is 390 DEG C, to the Mg-Al composite base
Material carries out 8 passes, and the amount of rolling is respectively 26.7%, 20%, 25%, 25%, 30%, 30%, 35%, 50% down per pass, is finally obtained
With a thickness of the magnalium composite board A4 of 1.1mm.
Embodiment 5
Step 1: magnesium alloy is processed into the magnesium alloy rod that diameter is 90mm, it is clear by vapour degreasing, solvent washing, pickling solution
It washes and the mode of mechanical grinding removes surface and oil contaminant and oxide, the magnesium alloy rod is then fixed on casting die
Type is intracavitary, and the diameter of the type chamber is 125mm, and the casting die and magnesium alloy rod are preheated 1.5h at 200 DEG C.
Step 2: melting being carried out to aluminium alloy, the aluminium alloy solution of molten condition is obtained, when the aluminium alloy solution temperature
After reaching 690 DEG C, 5min is kept the temperature to the aluminium alloy solution.
Step 3: the type that the molten aluminium alloy is poured into casting die is intracavitary, and the aluminium alloy solution is made to coat institute completely
Magnesium alloy rod is stated, is then cooled down at room temperature, Mg-Al composite ingot casting is obtained after solidification.
Step 4: the Mg-Al composite ingot casting being placed in extrusion die, first to the extrusion die and Mg-Al composite ingot casting
It is preheated, preheating temperature is 390 DEG C, preheating time 5h, is then squeezed the Mg-Al composite ingot casting, and temperature is squeezed
It is 375 DEG C, extrusion ratio 15, the final Mg-Al composite blank for obtaining the plate with a thickness of 10mm.
Step 5: the Mg-Al composite blank being rolled wherein, rolling temperature is 390 DEG C, to the Mg-Al composite base
Material carry out 6 passes, the amount of rolling is respectively 20%, 25%, 33%, 37.5%, 30%, 40% down per pass, finally obtain with a thickness of
The magnalium composite board A5 of 1.0mm.
Embodiment 6
Step 1: magnesium alloy is processed into the magnesium alloy rod that diameter is 65mm, it is clear by vapour degreasing, solvent washing, pickling solution
It washes and the mode of mechanical grinding removes surface and oil contaminant and oxide, the magnesium alloy rod is then fixed on casting die
Type is intracavitary, and the diameter of the type chamber is 92mm, and the casting die and magnesium alloy rod are preheated 1.5h at 200 DEG C.
Step 2: melting being carried out to aluminium alloy, the aluminium alloy solution of molten condition is obtained, when the aluminium alloy solution temperature
After reaching 690 DEG C, 3min is kept the temperature to the aluminium alloy solution.
Step 3: the type that the molten aluminium alloy is poured into casting die is intracavitary, and the aluminium alloy solution is made to coat institute completely
Magnesium alloy rod is stated, is then cooled down at room temperature, Mg-Al composite ingot casting is obtained after solidification.
Step 4: the Mg-Al composite ingot casting being placed in extrusion die, first to the extrusion die and Mg-Al composite ingot casting
It is preheated, preheating temperature is 385 DEG C, preheating time 5h, is then squeezed the Mg-Al composite ingot casting, and temperature is squeezed
It is 370 DEG C, extrusion ratio 20, the final Mg-Al composite blank for obtaining the plate with a thickness of 10mm.
Step 5: the Mg-Al composite blank being rolled wherein, rolling temperature is 390 DEG C, to the Mg-Al composite base
Material carry out 6 passes, the amount of rolling is respectively 25%, 25%, 33%, 37.5%, 30%, 40% down per pass, finally obtain with a thickness of
The magnalium composite board A6 of 1.0mm.
Embodiment 7
Step 1: magnesium alloy is processed into the magnesium alloy rod that diameter is 65mm, it is clear by vapour degreasing, solvent washing, pickling solution
It washes and the mode of mechanical grinding removes surface and oil contaminant and oxide, the magnesium alloy rod is then fixed on casting die
Type is intracavitary, and the diameter of the type chamber is 92mm, and the casting die and magnesium alloy rod are preheated 1.5h at 200 DEG C.
Step 2: melting being carried out to aluminium alloy, the aluminium alloy solution of molten condition is obtained, when the aluminium alloy solution temperature
After reaching 695 DEG C, 5min is kept the temperature to the aluminium alloy solution.
Step 3: the type that the molten aluminium alloy is poured into casting die is intracavitary, and the aluminium alloy solution is made to coat institute completely
Magnesium alloy rod is stated, is then cooled down at room temperature, Mg-Al composite ingot casting is obtained after solidification.
Step 4: the Mg-Al composite ingot casting being placed in extrusion die, first to the extrusion die and Mg-Al composite ingot casting
It is preheated, preheating temperature is 385 DEG C, preheating time 5h, is then squeezed the Mg-Al composite ingot casting, and temperature is squeezed
It is 370 DEG C, extrusion ratio 12, the final Mg-Al composite blank for obtaining the plate with a thickness of 12mm.
Step 5: the Mg-Al composite blank being rolled wherein, rolling temperature is 390 DEG C, to the Mg-Al composite base
Material carries out 7 passes, and the amount of rolling is respectively 26.7%, 20%, 25%, 25%, 30%, 30%, 35% down per pass, finally obtains thickness
For the magnalium composite board A7 of 2.0mm.
Embodiment 8
Magnalium composite board is prepared using preparation method same as Example 1, unlike, it further include step 7: to the magnesium
Aluminum composite plate material is made annealing treatment, and annealing temperature is 250 DEG C, time 1.5h.The final magnalium for obtaining thickness 1.1mm specification
Superimposed type composite board A8.
Embodiment 9
Magnalium composite board is prepared using preparation method same as Example 1, unlike, the extruding temperature in step 4 is
365 DEG C, extrusion ratio 10 finally obtains the magnalium composite board A9 with a thickness of 1.1mm.
Embodiment 10
Magnalium composite board is prepared using preparation method same as Example 1, unlike, the extruding temperature in step 4 is
365 DEG C, extrusion ratio 25 finally obtains the magnalium composite board A10 with a thickness of 1.1mm.
Embodiment 11
Magnalium composite board is prepared using preparation method same as Example 1, unlike, the extruding temperature in step 4 is
350 DEG C, extrusion ratio 11 finally obtains the magnalium composite board A11 with a thickness of 1.1mm.
Embodiment 12
Magnalium composite board is prepared using preparation method same as Example 1, unlike, the extruding temperature in step 4 is
400 DEG C, extrusion ratio 11 finally obtains the magnalium composite board A12 with a thickness of 1.1mm.
Embodiment 13
Magnalium composite board is prepared using preparation method same as Example 1, unlike, the extruding temperature in step 4 is
365 DEG C, extrusion ratio 7 finally obtains the magnalium composite board A13 with a thickness of 1.1mm.
Embodiment 14
Magnalium composite board is prepared using preparation method same as Example 1, unlike, the extruding temperature in step 4 is
320 DEG C, extrusion ratio 12 finally obtains the magnalium composite board A14 with a thickness of 1.1mm.
Embodiment 15
Magnalium composite board is prepared using preparation method same as Example 1, unlike, the extruding temperature in step 4 is
420 DEG C, extrusion ratio 30 finally obtains the magnalium composite board A15 with a thickness of 1.1mm.
Comparative example 1
Step 1: taking magnesium alloy and each one piece of aluminium alloy, the mode by surface by chemical cleaning and mechanical grinding removes surface
Greasy dirt and oxide.
Step 2: cleared up in step 1 two pieces of almag thin plates are overlapped mutually and are fixed
Step 3: will be rolled after aluminium alloy plate and magnesium alloy plate superposition, 390 DEG C of rolling temperature, the amount of rolling is distinguished down per pass
It is 26.7%, 20%, 25%, 25%, 30%, 30%, 35%, 40%, obtains the magnesium of thickness 1.1mm specification after eventually passing through 8 passes
Aluminium superimposed type composite board D1.
Mechanics Performance Testing is carried out to all composite boards of above embodiments and comparative example: according to GB/T228.1-
2010, omnipotent (pulling force) testing machine of microcomputer controlled electronic using model CMT5105 carries out tensile property, and (yield strength resists
Tensile strength and elongation percentage) test.
Interfacial layer thickness test is combined to magnalium composite board A1-A12 and magnalium superimposed type composite board D1: in conjunction with
The test of thickness degree is observed and is measured using metallographic microscope, and test equipment is the DSX-CB model metallographic of OLYMPUS production
Microscope.
Measure above-described embodiment and the yield strength of the magnalium composite board in comparative example, tensile strength, elongation percentage, combination
As a result interfacial layer thickness T is listed in table 1.
Table 1
Boundary layer composition test is combined to magnalium composite board A6, the combination interface composition of layer test refers to: foundation
JY/T 010-1996 analytic type scanning electron microscope method general rule and GB/T 17359-2012 power spectrum quantitative analysis
Method general rule is tested, finally measure Mg element and Al element mass percentage content be respectively 58.84wt%,
36.62wt%, i.e., the content ratio of Al and Mg is 1:1.6 in combination interface layer.
From the data of table 1 it is found that compared to comparative example 1 magnalium superimposed type composite board, the magnalium of the embodiment of the present invention
Yield strength, tensile strength and the elongation percentage of composite board are in preferably range, improve the comprehensive of magnalium composite board
The mechanical property of conjunction.Comparison magnalium composite board A1 and A9-15 can be seen that when technological parameter of the invention (is squeezed by such as extrusion ratio
Press temperature) control in limited range of the present invention when, the mechanical property for the magnalium composite board being prepared is more excellent, in conjunction with
Intensity is higher.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (14)
1. a kind of magnesium alloy composite board material, which is characterized in that the magnesium alloy composite board material includes magnesium alloy sandwich layer, aluminium alloy packet
Coating and take shape in the combination interface layer between the magnesium alloy sandwich layer, aluminium alloy clad layer.
2. magnalium composite board as described in claim 1, which is characterized in that the combination interface layer with a thickness of 15-35 μm.
3. magnalium composite board as described in claim 1, which is characterized in that in the combination interface layer, with the combination
On the basis of the gross mass of boundary layer, the content ratio of Al and Mg are 1:(1-1.6).
4. a kind of preparation method of magnalium composite board, which is characterized in that comprising steps of
Step 1: the aluminium alloy solution of molten condition is cast in into magnesium alloy member surface, enables aluminum alloy to solution cladding magnesium alloy member,
Then it cools down, obtains Mg-Al composite ingot casting；
Step 2: step 1 gained Mg-Al composite ingot casting being squeezed, the Mg-Al composite blank of plate is obtained；
Step 3: step 2 gained Mg-Al composite blank being rolled, magnalium composite board is obtained.
5. preparation method as claimed in claim 4, which is characterized in that in the step 2, before being squeezed, make described
Mg-Al composite ingot casting preheats 4-6h at 350-400 DEG C.
6. preparation method as claimed in claim 4, which is characterized in that in the step 2, the temperature of the extruding is 350-
390 DEG C, the extrusion ratio of the extruding is 10-25.
7. preparation method as claimed in claim 4, which is characterized in that the magnesium alloy member is magnesium alloy rod.
8. preparation method as claimed in claim 4, which is characterized in that further include being carried out to magnesium alloy member before the step 1
Pre-treatment, the pre-treatment include chemical cleaning and/or mechanical grinding to remove greasy dirt and/or the oxidation on magnesium alloy member surface
Object.
9. preparation method as claimed in claim 4, which is characterized in that further include that smelting aluminium alloy must melt before the step 1
The aluminium alloy solution for melting state keeps the temperature 3- to the aluminium alloy solution after aluminium alloy solution temperature reaches 690-720 DEG C
5min。
10. preparation method as claimed in claim 4, which is characterized in that the temperature of the rolling is 350-400 DEG C, described to roll
It is made as a time rolling or multi- pass rolling.
11. preparation method as claimed in claim 4, which is characterized in that the amount of rolling is 20-50% down per pass.
12. preparation method as claimed in claim 4, which is characterized in that it further include annealing after the rolling, the annealing
Temperature is 250 DEG C, time 1-3h.
13. preparation method as described in claim 1, which is characterized in that comprising steps of
Step 1: magnesium alloy being processed into the magnesium alloy rod with pre-set dimension, then the magnesium alloy rod is fixed on and is poured
In casting mould；
Step 2: melting being carried out to aluminium alloy, obtains the aluminium alloy solution of molten condition；
Step 3: the casting die and magnesium alloy rod preheat 1-2h at 150-200 DEG C, and the aluminium alloy solution is added
In casting die, so that the aluminium alloy solution is coated the magnesium alloy rod completely, then cool down at room temperature, magnesium is obtained after solidification
Aluminium composite ingot；
Step 4: the Mg-Al composite ingot casting being placed in extrusion die, the Mg-Al composite ingot casting is squeezed, obtains plate
The Mg-Al composite blank of shape；
Step 5: the Mg-Al composite blank being rolled, magnalium composite board is obtained.
14. a kind of magnalium composite board, which is characterized in that the magnalium composite board is prepared by claim 4-13 any one
Method is prepared.
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| CN114669651A (en) * | 2022-04-13 | 2022-06-28 | 中国航空制造技术研究院 | Method for manufacturing magnesium-aluminum metal composite structure |
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